Date of Observation: 02/17/2017
Name: Zach Guy
Aspect: North, North East, East, South East, South, South West
Elevation: 9500-11900 ft
Avalanches: Skier triggered several dry loose avalanches on very steep, northerly facing terrain N/ATL. One of these sluffs pulled out a small wind slab, about 10″ thick. All were D1 in size. No other signs of instability. Plenty of older avalanches from the past week or so, dry loose, wet loose, storm slabs, etc, but nothing ran today that we saw. See photos.
Weather: A few bands of clouds passed over mid-day, but overcast skies didn’t start building until 3:30 p.m. Warm day. Southwest winds began picking up in the late afternoon, light to moderate. No precip.
Snowpack: Northerly aspects: the snow surface is .5 – 1 mm near surface facets at all elevations, capped by a thin wind skin above treeline, and textured by wind in some places.
Southerly aspects: Crusts softened mid-day but refroze into a thick melt-freeze crust, (5 cm or thicker), did not observe any facets above or below the crust where we traveled. The crust was mix of textured and slick. One slope holding a thin melt-freeze crust (E facing) had facets below the crust.